Metal packing-ring.



HUHN. I METAL BACKING RING. APPLICATION FILED JAN. 6/1913.

7 57, 4 Patenteq N0v. 25,1913.

Gustav GUSTAV HUHN, F BERLIN, GERMANY.

METAL rAcKINo-nmd.

Specification of Letters Patent.

Application filed'lanuary 6, 1913. Serial No. 740,429.

ToaZZ whom it may concern: Be it known that I, GUsrAv H HN, manufacturer, citizen of Germany, subject of 'the King-of Prussia and Emperor of Germany, 'residing at Berlintin the Kingdom of Prus sia and Empire of Germany, have invented new and useful Improvements in. Metal Packing-Rings, of which the following is a specification.

A difficulty arises during the use of the ordinary divided metal packing rings owing to 't-hefact that the ends of each ring section cannot at the outset be in close contact with each other because if this were so it would be impossible to tighten the packing ring into the plunger or shaft, and a leakage in the pack ing would very soon take place owing to the wearing away of the rings on the inside surface during use. Hitherto it has been essential to have the inside diameter of the sectional' packing rings somewhat less than the diameter of the piston or shaft against which a closure has to be effected so that the extremities of each sectional ring are not in close contact when first applied. .In order to prevent steam or other medium which has to be excluded from penetrating through the gap so formed between the two ends of the ring it has been thecustom to arrange the gaps in the rings so that they lie one above the other in alternate or staggered positions. .This expedient. how ever is on the one hand incomplete and does not always "attain its object especially in cases where the rings 36 have to effect a closure alternately inward and outward i. 0. against the plunger or shaft and-against the interior wall of the stuffing boxes of certain superheated steam to locomotives. I

A By means of the present invention. these defects are completely removed in all cases. For this purpose, one of the rings, which are preferably made of white metal, has one of 46 its ends made hollow and with tapering or thin walls and the rings at the outset are formed with the same inner diameter as that of the plunger or shaft so that the ends 6!) outset and the harmful gap which allows steam to penetrate is thus avoided. In pacle mgs hitherto used immediately the meeting ends of the sectional rings came into'contact rings onto the plunger or shaft against which they forma closure, and to overcome stuffing box, as is especially the case in theof sectional rings fit quite closely at the it was impossible to further tighten the this the packing had to be removed and the abutting ends ofthe rings filed away to en- Patented Nov. 25, 1913.

able the rings to be further tightened onto the plunger or shaft. This work is very objectionable. particularly inlocomot ve packings and is-obviated by the application of my invention. As here the ring walls of a tact of the interior surface of the ring withv the rod and the close contact of the abutting ends of the ring are consequently permanently maintained. The invention is applicable to all kinds of "metal rings and is "especially; suitable for white metal rings of the known description which are formed hollowan'd filled'with one of the abutting or meeting ends of the lubricant and provided with o'utlet openings I therefor on-the inside of the-ringz-a In the drawing a method of'executing the object of the invention'is illustrated. -Figure 1 shows a vertical'sectionzthrough a stufiing box provided with 'such Fig. 2 is a top view partly in section of a hollow ring made'up of two sectional rings,

and Fig. 3 the two abutting'ends of such a;

sectional ring -in perspective in separated position. I

The stufling box packing-shown in Fig.1 consists alternately of hollow "white metal rings 1 filled with lubricant-and providedonthe inside with outlet openings,- and solid ringsfz and 3. Both kinds of rings,

the hollow as well as the solid are made wedge shaped in such a way that the hollow rings 1 are pressed against the plunger'or spindle 4 and 1 the solid rings 2 and 3 against the wall of the stufling box-5. A spring 6 of the known type at the bottom of the stufling box serves for exercisin close coin.

wt ing pressure on the rings." In ,the'method iio are of uniform thinness.

case of the solid rings 2- and 3, this is not so as may be seen at 10 because these rings are forced' outward away from the spindle.

In order now, in spite of the close contact of the sectional rings 7 and S, to render possible a tightening after wear, at the one end of each of theseotional rings the walls are made thin as shown at 11. In the method of execution illustrated this is accomplished by the walls of the hollow rings at the respective ends tapering oft into wedge or pyramid shape. Theclosing stopper 12 is at these ring ends placed correspondingly deep in the interior of the sectional ring so that the thin walled ring ends are situated at the outside of the stopper 12. The abutting end 13 of the other sectional ring has the usual construction, 2'. e. the sectional ring has normal wall thickness at this end and correspondingly the closing stopper also is placed here in its usual po' sition.

Instead of making the Walls thin by a wedge shape reduction of them they may be made thin all the way down by setting oil the ends ofthe' walls against their other part so that the walls at the end of the ring Instead of one end of each sectional ring being made thin in its-walls in this way, both: ends of one section may of course be provided with thin Walls and thissectional ring may then be used with a. normal ring section. However the method shown in the example of execution illustrated is to be preferred as a rule because in thls case only one sort of sectional ring needs to be manufactured in which the one end' is provided with thin walls. 1

Having now described my invention what I claim and desire to secure by Letters Patentof the United States is:

1. A divided metal packing ring with tube like hollow ends, at least one of said abutting hollow ends of the sectional rings having thin walls, sothat these thin walls may be worn away by the pressure and the vibrating friction of the/abutting ring end in proportion to the wearing away of the interior bearing surface of the ring.

2. A metal packing ring composed of sections one of. the abutting ends of said sections being hollow and having thin walls.

'3. A divided metal packing ring with tubo like hollow ends, at least one of'said abutting hollow ends of the sectional rings hav' ing thin walls, the outsidcs of said thin walls lying in the same planes as the outside of the normal parts of said sectional rings.

4;. A divided metal packing ring com posed of sectional rings, one end of each of said sectional rings being hollow and having thin walls, the other end being normal.

5. A divided hollow metal packing ring composed of sectional hollow rings of white metal and filled with lubricant, one of the abutting ends of said sectional hollow rings having thin walls, the abutting end of the neighboring ring being normal.

6. A divided hollow metal packing ring composed of sectional hollow rings of white metal and filled with lubricant, one of the abutting ends of said sectional hollow rings having thin walls, the abutting end of the neighboring ring being normal, and closing stoppers at said thinned ends of the sec tional hollow rings lying countersunk be hind said thinned parts of the walls of said sectional rings.

7. A divided metal packing ring having hollow ends, one of the said hollow ends having thin walls, said walls being reduced on their inner faces to cause the outer faces of said walls to lie in thesame plane as the outer faces of the normal parts of the ring sections.

In testimony whereof I have hcreuntoset my hand in presenceof two subscribing witnesses.

GUSTMT noun. Witnesses WOLDEMAR .l-IAUr'r, anny Hnsrnn. 

